Hey mate,
Not having read what other ppl have said, my advice if you go to Big D
Good Luck with it all - flights use www.statravel.com.au for the Australia to US leg, then buy your flights from the US direct, much cheaper over there. When I was there used the US Site for STA Travel (www.statravel.com) - ps you don't need to be a student to book, just click adult fare). Dallas is a city in the middle of the friggin Desert! There are some cool bars to visit, me and my mate have dated a few texans (from "BIG D") back in our Uni Days, it's a funny place....LOTS of Money in that city, but it's definitely a place where you need to know people to get the most out of it, I don't know how old you are, but if you're even up to Mid 20's, while there try razz up a few college bars - Southern Methodist University is the biggest in D town is a good place to start, LOTS OF WOMEN THERE lol(www.smu.eu), get to know some locals and they'll want you to come out with them and show u a good time - In General, Americans are really friendly (FAKE, but Friendly)- work the accent haha! Well If you get in with some young locals stick it out there for a bit, cos they'll show u a good time - otherwise, head to LA or Cali or Vegas - no point hangin out in the middle of the desert if u don't know some good crew! Ok kinda getting off track lol, RE TICKETS I have no idea - but if you meet some rich fratty boys or sorority girls I'm sure their folks may have box seats to the game lol, we got free tix to the Mav's games through random people we met.....other than that I have no idea where 2 get them, ALL star game Tix would be hot hot hot property! Also a very valuable side note, try to find an airline that has a stop over in Hawaii on the way / way back......if you get on that flight you can spend like a week in hawaii for the same cost as if you got a flight from LA - Aus Direct, just a pointer as you may enjoy a "free" visit to hawaii.
Anyway Dude, get out there and party like a rockstar - good luck with it all!